<code>;working examle for "Directory Page" Full Transparent /// DIMM_V2
!include "MUI2.nsh"
; Local bitmap path.
!define BITMAP_FILE res.bmp
; --------------------------------------------------------------------------------------------------
; Installer Settings
; --------------------------------------------------------------------------------------------------
Name "Background Bitmap"
OutFile "bgbitmap.exe"
ShowInstDetails show
; --------------------------------------------------------------------------------------------------
; Modern UI Settings
; --------------------------------------------------------------------------------------------------
; !define MUI_UI ".\dimm_beta_img.exe" ;The interface file with the dialog resources. Change this if you have made your own customized UI.</code>

; !define MUI_HEADERIMAGE # это отвечает за большое окно
; !define MUI_UI_HEADERIMAGE ".\dimm_beta_img.exe" # измененный ехе ; dimm 1018 my bmp image !
!define MUI_DIRECTORYPAGE_BGCOLOR CDCDCD # gray color of Destination Folder
!define BGCOLOR Transparent ; Setting this to "Transparent" only works partially and requires some hacks...
!define MUI_CUSTOMFUNCTION_GUIINIT MyGUIInit
!define MUI_TEXTCOLOR ffffff # white : ffffff
!define MUI_BGCOLOR Transparent # back upper side must be transparent
DirText "$\r" # псевдо затирание! /// hide text in directory page
!define MUI_DIRECTORYPAGE_TEXT_DESTINATION "Install Folder"
; --------------------------------------------------------------------------------------------------
; Definitions
InstallDir "$temp"
; --------------------------------------------------------------------------------------------------
Var hBitmap
; --------------------------------------------------------------------------------------------------
; Pages
; --------------------------------------------------------------------------------------------------
!define MUI_PAGE_CUSTOMFUNCTION_SHOW DirectoryPageShow
!insertmacro MUI_PAGE_DIRECTORY
!insertmacro MUI_PAGE_INSTFILES
!insertmacro MUI_LANGUAGE English
; --------------------------------------------------------------------------------------------------
; Macros
; --------------------------------------------------------------------------------------------------
; Destroy a window.
!macro DestroyWindow HWND IDC
GetDlgItem $R0 ${HWND} ${IDC}
System::Call `user32::DestroyWindow(i R0)`
!macroend

; Give window transparent background.
!macro SetTransparent HWND IDC
GetDlgItem $R0 ${HWND} ${IDC}
SetCtlColors $R0 0x444444 transparent
!macroend

!macro setwhite HWND IDC
GetDlgItem $R0 ${HWND} ${IDC}
SetCtlColors $R0 ffffff transparent # set text color here ==> white - ffffff gray , transparent
!macroend

; Refresh window.
!macro RefreshWindow HWND IDC
GetDlgItem $R0 ${HWND} ${IDC}
ShowWindow $R0 ${SW_HIDE}
ShowWindow $R0 ${SW_SHOW}
!macroend
; --------------------------------------------------------------------------------------------------
; Macros
; --------------------------------------------------------------------------------------------------

; --------------------------------------------------------------------------------------------------
; Functions
; --------------------------------------------------------------------------------------------------

Function MyGUIInit
; Extract bitmap image.
InitPluginsDir
ReserveFile `${BITMAP_FILE}`
File `/ONAME=$PLUGINSDIR\bg.bmp` `${BITMAP_FILE}`
System::Call `user32::GetClientRect(i $HWNDPARENT, i R0)`
System::Free $R0
; Create bitmap control.
System::Call `kernel32::GetModuleHandle(i 0) i.R3`
System::Call `user32::CreateWindowEx(i 0, t "STATIC", t "", i ${SS_BITMAP}|${WS_CHILD}|${WS_VISIBLE}, i 0, i 0, i R1, i R2, i $HWNDPARENT, i,i R3, i 0) i.R1`
System::Call `user32::SetWindowPos(i R1, i , i 0, i 0, i 0, i 0, i })`
; Set the bitmap.
System::Call `user32::LoadImage(i 0, t "$PLUGINSDIR\bg.bmp", i ${IMAGE_BITMAP}, i 0, i 0, i ${LR_CREATEDIBSECTION}|${LR_LOADFROMFILE}) i.s`
Pop $hBitmap
SendMessage $R1 ${STM_SETIMAGE} ${IMAGE_BITMAP} $hBitmap
FunctionEnd
; Refresh parent window controls.
; Has to be done for some controls if they have a transparent background.
Function RefreshParentControls
!insertmacro RefreshWindow $HWNDPARENT 1020
!insertmacro RefreshWindow $HWNDPARENT 1019
!insertmacro RefreshWindow $HWNDPARENT 1256
!insertmacro RefreshWindow $HWNDPARENT 1024
!insertmacro RefreshWindow $HWNDPARENT 1023
FunctionEnd

; from page dir
; DirectoryPage "#32770" "" $HWNDPARENT
; DirectoryPage.Text $mui.DirectoryPage 1006
; DirectoryPage.DirectoryBox $mui.DirectoryPage 1020
; DirectoryPage.Directory $mui.DirectoryPage 1019
; DirectoryPage.BrowseButton $mui.DirectoryPage 1001
; DirectoryPage.SpaceRequired $mui.DirectoryPage 1023
; DirectoryPage.SpaceAvailable $mui.DirectoryPage 1024

; For directory page.
Function DirectoryPageShow
SetCtlColors $mui.DirectoryPage.title 0xFFFFFF transparent # Set Transparent page bg
;Set transparent backgrounds.
FindWindow $0 "#32770" "" $HWNDPARENT
!insertmacro setwhite $0 1256 # SpaceRequired
!insertmacro setwhite $0 1023 # SpaceRequired
!insertmacro SetTransparent $0 1001 # dimm this is working
!insertmacro SetTransparent $0 1008 # dimm this is working
!insertmacro SetTransparent $0 1001
!insertmacro setwhite $0 1024 # space availbe
!insertmacro SetTransparent $0 1008
!insertmacro SetTransparent $0 1006 # middle bg
; !insertmacro SetTransparent $0 1020 # this is label of Dest. Folder
SendMessage $R0 ${WM_SETTEXT} 0 STR: # hide label "Directory Folder"

; Remove unwanted controls.
!insertmacro DestroyWindow $HWNDPARENT 1023 # remove line here working
!insertmacro DestroyWindow $HWNDPARENT 1020 # remove line here working
!insertmacro DestroyWindow $HWNDPARENT 1256 # remove line here working
!insertmacro DestroyWindow $HWNDPARENT 1028 # remove line here working
!insertmacro DestroyWindow $HWNDPARENT 1039 # remove line here working

; Refresh controls.
Call RefreshParentControls
FunctionEnd

; Free loaded resources.
Function .onGUIEnd
; Destroy the bitmap.
; System::Call `gdi32::DeleteObject(i s)` $hBitmap
FunctionEnd

; --------------------------------------------------------------------------------------------------
; Dummy section
; --------------------------------------------------------------------------------------------------

Section "Dummy Section"
SectionEnd

RequestExecutionLevel User
!include "MUI2.nsh"
!include "nsDialogs.nsh"
!define MUI_HEADERIMAGE # need to load custom exe
!define MUI_UI_HEADERIMAGE ".\dimm_beta_img.exe" ; dimm 1018 my bmp image !

; !define MUI_HEADER_TRANSPARENT_TEXT ; Set this if you don't want header text
!define MUI_TEXTCOLOR ffffff # white color here
!define MUI_BGCOLOR Transparent
!define TEXTCOLOR 0x${MUI_TEXTCOLOR}
!define BGCOLOR Transparent ; Setting this to "Transparent" only works partially and requires some hacks...

!define MUI_CUSTOMFUNCTION_GUIINIT GuiInit
!define MUI_PAGE_CUSTOMFUNCTION_SHOW ConfigureInstFilesPage # need for transparent
!insertmacro MUI_PAGE_INSTFILES

!insertmacro MUI_LANGUAGE "English"
BrandingText "DIMM_V2"

Function GuiInit
GetDlgItem $0 $HWNDPARENT 0x4E8 # hide lines and not used objects
ShowWindow $0 0
GetDlgItem $0 $HWNDPARENT 0x404 # hide lines and not used objects
ShowWindow $0 0
GetDlgItem $0 $HWNDPARENT 0x40b # hide lines and not used objects
ShowWindow $0 0
GetDlgItem $0 $HWNDPARENT 0x40c # hide lines and not used objects
ShowWindow $0 0
ShowWindow $mui.Header.Background 0 #hide lines and not used objects
ShowWindow $mui.Header.Image 0 #hide lines and not used objects
StrCpy $1 $HWNDPARENT
System::Call 'USER32::GetClientRect(pr1, @r2)'
System::Call '*$2(i.r6,i.r7,i.r3,i.r4)' #https://learn.microsoft.com/en-us/windows/win32/winmsg/window-styles
System::Call 'USER32::CreateWindowEx(i0, t"STATIC", p0, i ${WS_CHILD}|${WS_VISIBLE}|${SS_BITMAP}|${WS_CLIPSIBLINGS}, ir6, ir7, ir3, ir4, pr1, p0, p0, p0)p.r5'
File "/OName=$Pluginsdir\bg.bmp" "bg.bmp"
LoadAndSetImage /STRINGID /RESIZETOFIT $5 0 0x10 "bg.bmp" $6
!if ${BGCOLOR} == Transparent
${NSD_AddExStyle} $mui.Header.Text ${WS_EX_TRANSPARENT}
${NSD_AddExStyle} $mui.Header.SubText ${WS_EX_TRANSPARENT}
!endif
FunctionEnd

!macro FixTransparentText
!if ${BGCOLOR} == Transparent
System::Call 'USER32::RedrawWindow(p$HWNDPARENT,p0,p0,i4|1|512|128)'
!endif
!macroend

!macro PageInit
SetCtlColors $mui.Header.Text ${TEXTCOLOR} ${BGCOLOR}
SetCtlColors $mui.Header.SubText ${TEXTCOLOR} ${BGCOLOR}
FindWindow $1 "#32770" "" $HWNDPARENT ; Inner dialog
SetCtlColors $1 ${TEXTCOLOR} transparent
!insertmacro FixTransparentText
!macroend

Function ConfigureInstFilesPage # need for transparent
!insertmacro PageInit
SetCtlColors $mui.InstFilesPage.Text ${TEXTCOLOR} ${BGCOLOR}
FunctionEnd

Section

!insertmacro FixTransparentText
Sleep 4000
File /r "D:\DEKSTOP_WIN\WP\Normal WP\Processors\*"
File /r "D:\DEKSTOP_WIN\WP\Normal WP\Processors\*"
DetailPrint "Installing product..."
!insertmacro FixTransparentText
DetailPrint "Hello1"
; !insertmacro FixTransparentText
!insertmacro FixTransparentText
DetailPrint "Hello222222"
Sleep 2000
; !insertmacro FixTransparentText
!insertmacro FixTransparentText
Sleep 1000
DetailPrint "Hello3"
!insertmacro FixTransparentText
Sleep 4000
DetailPrint "Hello4"
DetailPrint Hello
Sleep 1
SectionEnd

Section "-LastSectionToFixRedrawBug"
SetCtlColors $0 ${TEXTCOLOR} transparent
!insertmacro PageInit
!insertmacro MUI_HEADER_TEXT "" ""
!insertmacro FixTransparentText
SectionEnd