C language implementation setting desktop wallpaper

Key code ：

SystemParametersInfo(SPI_SETDESKWALLPAPER, 0, "C:\\Users\\star-dream\\Pictures\\Saved Pictures\\1.jpg", SPIF_SENDCHANGE|SPIF_UPDATEINIFILE);

More information , Please refer to Baidu Encyclopedia

Today's main character is ： How to use C Language implementation desktop wallpaper

The function prototype ：

BOOL SystemParametersInfo（UINT uiAction,UINT uiParam,PVOID pvParam,UINT fWinlni）;

Parameter description ：

1. uiAction： This parameter specifies the system-level parameters to query or set .
2. uiParam：uiParam All is in the parameter specification ulParam Are all errors .（ The general values 0）
3. pvParam： Related to system parameters that are queried or set .（ If wallpaper is set , Just fill in the picture address ）
4. fWinlni： If system parameters are set , It is used to specify whether to update the user profile .（ Value 0 Or any item in the table below ）

SPIF_UPDATEINIFILE	Writes the new system parameter Settings to the user profile .
SPIF_SENDCHANGE	Broadcast after updating the user profile WM_SETTINGCHANGE news .

SystemParametersInfo Function has 4 Parameters , Mainly for ：( Corresponding to the function prototype )

1. SPI_SETDESKWALLPAPER： Set desktop wallpaper .
2. The first 2 Parameters are general Set to 0, that will do .
3. The first 3 Fill in parameters Where the picture is located
4. The first 4 Two parameters can fill 0, perhaps SPIF_UPDATEINIFILE | SPIF_SENDCHANGE

---

Code example （ For reference only ） 

#include <stdio.h>
#include <stdlib.h>
#include <Windows.h>

void menu()
{
	printf("----------------------\n");
	printf("|      1. Cherry blossoms         |\n");
	printf("|      2. Exquisite         |\n");
	printf("|      3. scenery         |\n");
	printf("|      4. loop         |\n");
	printf("----------------------\n");
}
 
int main()
{
	
	int choice = 0;
	int count = 10;

	menu();
	printf(" Please enter the option :");
	scanf("%d",&choice);

	switch(choice)
	{
		case 1:
			SystemParametersInfo(SPI_SETDESKWALLPAPER, 0, "C:\\Users\\star-dream\\Pictures\\Saved Pictures\\1.jpg", SPIF_SENDCHANGE|SPIF_UPDATEINIFILE);
			break;
		case 2:
			SystemParametersInfo(SPI_SETDESKWALLPAPER, 0, "C:\\Users\\star-dream\\Pictures\\Saved Pictures\\2.jpg", SPIF_SENDCHANGE|SPIF_UPDATEINIFILE);
			break;
		case 3:
			SystemParametersInfo(SPI_SETDESKWALLPAPER, 0, "C:\\Users\\star-dream\\Pictures\\Saved Pictures\\3.png", SPIF_SENDCHANGE|SPIF_UPDATEINIFILE);
			break;
		case 4:
			while(count)
			{
				SystemParametersInfo(SPI_SETDESKWALLPAPER, 0, "C:\\Users\\star-dream\\Pictures\\Saved Pictures\\1.jpg", SPIF_SENDCHANGE|SPIF_UPDATEINIFILE);
				Sleep(2000);
				SystemParametersInfo(SPI_SETDESKWALLPAPER, 0, "C:\\Users\\star-dream\\Pictures\\Saved Pictures\\2.jpg", SPIF_SENDCHANGE|SPIF_UPDATEINIFILE);
				Sleep(2000);
				SystemParametersInfo(SPI_SETDESKWALLPAPER, 0, "C:\\Users\\star-dream\\Pictures\\Saved Pictures\\3.png", SPIF_SENDCHANGE|SPIF_UPDATEINIFILE);
				Sleep(2000);
				count--;
			}
			break;
	}
	return 0;
}

  Saved picture location ：